State Constitutions, examples of the 34 states that clearly forbid the government transportation monopolies put in place since the Federal government began violating the "post Roads" enumerated limit with The Federal-Aid Highway Act of 1916:
- Arkansas: Article 2, Bill of Rights, 19. "Perpetuities and monopolies. Perpetuities and monopolies are contrary to the genius of a republic, and shall not be allowed; nor shall any hereditary emoluments, privileges or honors ever be granted or conferred in this State."
- Georgia: Article I, Bill of Rights, Section VI, Paragraph V: "Shall not have the power to authorize any contract or agreement which may have the effect of or which is intended to have the effect of encouraging a monopoly, which is hereby declared to be unlawful and void."
- Maryland: Article. 41. "That monopolies are odious, contrary to the spirit of a free government and the principles of commerce, and ought not to be suffered."
- Massachusetts, Article 6: "No man, nor corporation, or association of men, have any other title to obtain advantages, or particular and exclusive privileges."
- North Carolina: Article 1, Sec. 34. Perpetuities and monopolies. "Perpetuities and monopolies are contrary to the genius of a free state and shall not be allowed."
- Oklahoma: Article II, Bill of Rights, SECTION II-32. "Perpetuities and monopolies are contrary to the genius of a free government, and shall never be allowed, nor shall the law of primogeniture or entailments ever be in force in this State."
- Texas: Article 1, Bill of Rights, Sec. 26. PERPETUITIES AND MONOPOLIES; PRIMOGENITURE OR ENTAILMENTS. Perpetuities and monopolies are contrary to the genius of a free government, and shall never be allowed, nor shall the law of primogeniture or entailments ever be in force in this State.
- Utah: Article XII, Section 20 [Free market system as state policy -- Restraint of trade and monopolies prohibited.] It is the policy of the state of Utah that a free market system shall govern trade and commerce in this state to promote the dispersion of economic and political power and the general welfare of all the people.
- Wyoming: Art. 1, 30. Monopolies and perpetuities prohibited. "Perpetuities and monopolies are contrary to the genius of a free state, and shall not be allowed. Corporations being creatures of the state, endowed for the public good with a portion of its sovereign powers, must be subject to its control."
Some states put the prohibition of monopolies into laws:
- South Carolina:SECTION 39-3-10. "Arrangements, contracts, agreements, trusts and combinations adversely affecting competition or price declared against public policy.All arrangements, contracts, agreements, trusts or combinations (a) between two or more persons as individuals, firms or corporations, made with a view to lessen, or which tend to lessen, full and free competition in the importation or sale of articles imported into this State or in the manufacture or sale of articles of domestic growth or of domestic raw material, (b) between persons or corporations designed or which tend to advance, reduce or control the price or the cost to the producer or consumer of any such product or article and (c) between two or more persons as individuals, firms, corporations, syndicates or associations that may lessen or affect in any manner the full and free competition in any tariff, rates, tolls, premium or prices in any branch of trade, business or commerce are declared to be against public policy, unlawful and void."